Tinea corporis is a dermatophyte infection of the face, trunk, and extremities.
Tinea corporis is a dermatophytosis that causes pink-to-red annular (O-shaped) patches and plaques with raised scaly borders that expand peripherally and tend to clear centrally. A rare variant form appears as nummular (circle- or round-shaped) scaling patches studded with small papules or pustules that have no central clearing. Common causes are Trichophyton mentagrophytes,T. rubrum, and Microsporum canis.
Treatment of mild-to-moderate lesions is an imidazole, ciclopirox, naftifine, or terbinafine in cream, lotion, or gel. The drug should be rubbed in bid continuing at least 7 to 10 days after lesions disappear, typically at about 2 to 3 wk.
Extensive and resistant lesions occur in patients infected with T. rubrum and in people with debilitating systemic diseases. For such cases, the most effective therapy is oral itraconazole 200 mg once/day or terbinafine 250 mg once/day for 2 to 3 wk.